<%@page language="java" pageEncoding="utf-8" %>
<!DOCTYPE html>

<html lang="en">
<head>
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">

    <link rel="stylesheet" href="./layui/css/layui.css" media="all">

    <title>layui.form</title>
    <style>
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        /* 使用flex布局，让内容垂直和水平居中 */

        section {
            /* 相对定位 */
            position: relative;
            overflow: hidden;
            display: flex;
            justify-content: center;
            align-items: center;
            min-height: 100vh;
            /* linear-gradient() 函数用于创建一个表示两种或多种颜色线性渐变的图片 */
            background: linear-gradient(to bottom, #f1f4f9, #dff1ff);
        }

        /* 背景颜色 */

        section .color {
            /* 绝对定位 */
            position: absolute;
            /* 使用filter(滤镜) 属性，给图像设置高斯模糊*/
            filter: blur(200px);
        }

        /* :nth-child(n) 选择器匹配父元素中的第 n 个子元素 */

        section .color:nth-child(1) {
            top: -350px;
            width: 600px;
            height: 600px;
            background: #ff359b;
        }

        section .color:nth-child(2) {
            bottom: -150px;
            left: 100px;
            width: 500px;
            height: 500px;
            background: #fffd87;
        }

        section .color:nth-child(3) {
            bottom: 50px;
            right: 100px;
            width: 500px;
            height: 500px;
            background: #00d2ff;
        }

        .box {
            position: relative;
        }

        /* 背景圆样式 */

        .box .circle {
            position: absolute;
            background: rgba(255, 255, 255, 0.1);
            /* backdrop-filter属性为一个元素后面区域添加模糊效果 */
            backdrop-filter: blur(5px);
            box-shadow: 0 25px 45px rgba(0, 0, 0, 0.1);
            border: 1px solid rgba(255, 255, 255, 0.5);
            border-right: 1px solid rgba(255, 255, 255, 0.2);
            border-bottom: 1px solid rgba(255, 255, 255, 0.2);
            border-radius: 50%;
            /* 使用filter(滤镜) 属性，改变颜色。
            hue-rotate(deg)  给图像应用色相旋转
            calc() 函数用于动态计算长度值
            var() 函数调用自定义的CSS属性值x*/
            filter: hue-rotate(calc(var(--x) * 70deg));
            /* 调用动画animate，需要10s完成动画，
            linear表示动画从头到尾的速度是相同的，
            infinite指定动画应该循环播放无限次*/
            animation: animate 10s linear infinite;
            /* 动态计算动画延迟几秒播放 */
            animation-delay: calc(var(--x) * -1s);
        }

        /* 背景圆动画 */

        @keyframes animate {
            0%, 100% {
                transform: translateY(-50px);
            }
            50% {
                transform: translateY(50px);
            }
        }

        .box .circle:nth-child(1) {
            top: -50px;
            right: -60px;
            width: 100px;
            height: 100px;
        }

        .box .circle:nth-child(2) {
            top: 150px;
            left: -100px;
            width: 120px;
            height: 120px;
            z-index: 2;
        }

        .box .circle:nth-child(3) {
            bottom: 50px;
            right: -60px;
            width: 80px;
            height: 80px;
            z-index: 2;
        }

        .box .circle:nth-child(4) {
            bottom: -80px;
            left: 100px;
            width: 60px;
            height: 60px;
        }

        .box .circle:nth-child(5) {
            top: -80px;
            left: 140px;
            width: 60px;
            height: 60px;
        }

        /* 登录框样式 */

        .container {
            position: relative;
            width: 400px;
            min-height: 400px;
            background: rgba(255, 255, 255, 0.1);
            display: flex;
            justify-content: center;
            align-items: center;
            backdrop-filter: blur(5px);
            box-shadow: 0 25px 45px rgba(0, 0, 0, 0.1);
            border: 1px solid rgba(255, 255, 255, 0.5);
            border-right: 1px solid rgba(255, 255, 255, 0.2);
            border-bottom: 1px solid rgba(255, 255, 255, 0.2);
        }

        .form {
            position: relative;
            width: 100%;
            height: 100%;
            padding: 50px;
        }

        /* 登录标题样式 */

        .form h2 {
            position: relative;
            color: #fff;
            font-size: 24px;
            font-weight: 600;
            letter-spacing: 5px;
            margin-bottom: 30px;
            cursor: pointer;
        }

        /* 登录标题的下划线样式 */

        .form h2::before {
            content: "";
            position: absolute;
            left: 0;
            bottom: -10px;
            width: 0px;
            height: 3px;
            background: #fff;
            transition: 0.5s;
        }

        .form h2:hover:before {
            width: 53px;
        }

        .form .inputBox {
            width: 100%;
            margin-top: 20px;
        }

        /* 输入框样式 */

        .form .inputBox input {
            width: 100%;
            padding: 10px 20px;
            background: rgba(255, 255, 255, 0.2);
            outline: none;
            border: none;
            border-radius: 30px;
            border: 1px solid rgba(255, 255, 255, 0.5);
            border-right: 1px solid rgba(255, 255, 255, 0.2);
            border-bottom: 1px solid rgba(255, 255, 255, 0.2);
            font-size: 16px;
            letter-spacing: 1px;
            color: #fff;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
        }

        .form .inputBox input::placeholder {
            color: #fff;
        }

        /* 登录按钮样式 */

        .form .inputBox input[type="submit"] {
            background: #fff;
            color: #666;
            max-width: 100px;
            margin-bottom: 20px;
            font-weight: 600;
            cursor: pointer;
        }

        .forget {
            margin-top: 6px;
            color: #fff;
            letter-spacing: 1px;
        }

        .forget a {
            color: #fff;
            font-weight: 600;
            text-decoration: none;
        }

    </style>
</head>
<body>

<%@include file="window.jsp" %>

<section>
    <!-- 背景颜色 -->
    <div class="color"></div>
    <div class="color"></div>
    <div class="color"></div>
    <div class="box">
        <!-- 背景圆 -->
        <div class="circle" style="--x:0"></div>
        <div class="circle" style="--x:1"></div>
        <div class="circle" style="--x:2"></div>
        <div class="circle" style="--x:3"></div>
        <div class="circle" style="--x:4"></div>
        <!-- 登录框 -->
        <div class="container">
            <div class="form">
                <h2>图书管理</h2>
                <form class="layui-form" method="post"
                      action="/login">
                    <div class="layui-form-item">
                    <label class="layui-form-label"
                           style="text-align: center">用户名
                    </label>
                    <div class="layui-input-block">
                        <input type="text" name="username"
                               placeholder="请输入"
                               autocomplete="off" class="layui-input">
                    </div>
            </div>
            <div class="layui-form-item">
                <label class="layui-form-label" style="text-align:
                center">密码</label>
                <div class="layui-input-block">
                    <input type="password" name="password"
                           placeholder="请输入"
                           autocomplete="off" class="layui-input">
                </div>
            </div>
            <div class="layui-form-item">
                <div class="layui-inline">
                    <label class="layui-form-label"></label>
                    <div class="layui-input-block">
                        <input type="radio" name="role" value="0"
                               title="管理员">
                        <input type="radio" name="role" value="1"
                               title="用户" checked>
                    </div>
                </div>
                <div class="layui-input-block" style="float: right">
                    <button class="layui-btn" lay-submit
                            lay-filter="*">登录
                    </button>
                    <a href="./register.jsp"><span
                            class="layui-btn layui-btn-primary">注册</span></a>
                </div>
            </div>
                </form>
            </div>
        </div>
    </div>

</section>



<script src="./layui/layui.js"></script>
<script>
    layui.use('form', function () {
        var form = layui.form;

    });
</script>
</body>
</html>